munin-plugins-rails-0.2.13 adjusts for passenger 5

conf for rbenv and systemd symlink

[passenger_*]
user root
command /root/.rbenv/shims/ruby %c
env.passenger_status /root/.rbenv/shims/passenger-status
env.passenger_memory_stats /root/.rbenv/shims/passenger-memory-stats
env.graph_category Passenger
env.PASSENGER_INSTANCE_REGISTRY_DIR /tmp/aptmp

passenger_status.rb

#!/bin/env ruby
# encoding: utf-8
module Munin
  class PassengerStatus < RequestLogAnalyzerPlugin
    def ensure_configuration
      require_passenger_status
      super
    end

    def config
      status = `#{passenger_status}`

      status =~ /max\s+=\s+(\d+)/
      upper_limit = $1 || 150

      puts <<-CONFIG
graph_category #{graph_category}
graph_title Passenger stats
graph_vlabel count
graph_args --base 1000 -l 0
graph_info Passenger stats - railsdoctors.com

max_pool_size.label max pool size
app_groups.label app groups
processes.label processes
requests_in_top_level_queue.label requests in top level queue 
requests_in_queue.label requests in queue
sessions.label sessions
processed.label processed /10000
cpu.label %cpu /10
memory.label memory /100
CONFIG
      #  --upper-limit #{upper_limit}
      exit 0
    end

    def str_list str
      str
        .split(/\n/)
        .map(&:strip)
        .reject(&:empty?)
    end

    def run
      status = run_command(passenger_status, debug)

      str_list("
        Max pool size
        App groups
        Processes
        Requests in top-level queue        
      ").each do |str|
        key = str.downcase.gsub(/(\s|-)+/, '_')
        status =~ /#{str}\s*:\s*(\d+)/i
        puts "#{key}.value #{$1}"
      end

      str_list("
        Requests in queue
        Sessions
        Processed /10000
        CPU /10
        Memory /100
      ").each do |str|
        divisor = 1
        if str =~ /^(.*?)\s*\/\s*(\d+)\s*$/
          str = $1
          divisor = $2.to_f
        end
        key = str.downcase.gsub(/\s+/, '_')
        total = 0
        status.scan(/#{str}\s*:\s*(\d+)/).flatten.each { |count| total += count.to_i }
        puts "#{key}.value #{total/divisor}"  
      end

    end
  end
end